Sharp Elw531h Owners Manual

							SSCIENTIFICCIENTIFIC
CALCULATORALCULATOR
OPERATION PERATION GUIDEUIDE
SCIENTIFIC
CALCULATOR
OPERATION GUIDE

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CONTENTS
HOW TO OPERATE
Read Before Using
Functions and Key Operations
ON/OFF, entry correction keys   6
Data entry keys   7
Random key   8
Modify key   9
Basic arithmetic keys, parentheses   10
Percent   11
Inverse, square, cube, xth power of y, 
square root, cube root, xth root of y   12
10 to the power of x, common logarithm, 
logarithm of x to base a
   13
e to the power of x, natural logarithm   14
Factorials   15
Permutations, combinations   16
Time calculation   17
Fractional calculations   18
Memory calculations   19
Last answer memory   20
User-defined functions   21
Absolute value   22
Trigonometric functions   23
Arc trigonometric functions   24
Hyperbolic functions   25
Coordinate conversion   26
Binary, pental, octal, decimal, and 
hexadecimal operations (N-base)   27
Key layout   2
Reset switch/Display pattern   3
Display format and decimal setting function   3-4
Exponent display   4
Angular unit   5
STATISTICS FUNCTIONS
Data input and correction   28
“ANS” keys for 1-variable statistics   29
Data correction  30-32
“ANS” keys for 2-variable statistics   33
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How to Operate
Mode key

1. KEY LAYOUT
≈Read Before Using≈
This operation guide has been written based on the EL-W531, EL-W531G, and  
EL-W531H models. Some functions described here are not featured on other models.  
In addition, key operations and symbols on the display may differ according to the model. 
(SD): Single variable statistic calculation
(LINE): Linear regression calculation
(QUAD):  Quadratic regression calculation
(E_EXP):  
Eular Exponential regression calculation
(LOG):    Logarithmic regression calculation
(POWER):  Power regression calculation
(INV):   Inverse regression calculation
(EXP):   Exponential regression calculation
2nd function, ALPHA keys
Pressing these keys will enable the 
functions written in orange (2nd F) 
or green (ALPHA) above the 
calculator buttons.This calculator can operate in three different 
modes as follows.
[Normal mode]Mode = 0; normal mode 
for performing normal 
arithmetic and function 
calculations.
ON/C, OFF key
Direct function

 2nd function
Written in orange 
above the ON/C key
[STAT mode]Mode = 1; mode for 
performing 1- or 2-variable 
statistical calculations. To 
select the statistical sub-
mode, press the 
corresponding number key 
after           .
[Drill mode]Mode = 2; mode for 
performing drill 
calculations. To select the 
drill sub-mode, press the 
corresponding number 
key after           .
(MATH): Math drill
(TABLE): Multiplication table drill
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(specifies normal mode)

3. DISPLAY PATTERN
Initial display The actual display does not appear like this.  
This illustration is for explanatory purposes only.
Note: The calculator has two settings for displaying a 
floating point number: NORM1 (default setting) and 
NORM2. In each display setting, a number is 
automatically displayed in scientific notation outside a 
preset range:
 NORM1: 0.000000001 ≤ x ≤ 9999999999
 NORM2: 0.01 ≤ x ≤ 9999999999
100008.1
Appears 
when the 
entire 
equation 
cannot be 
displayed. Hyperbolic 
symbol (HYP)Alphabet 
symbol 
(ALPHA)Angular unit 
indicator 
(DEG/RAD/GRAD)
2ndF symbol
Appears when the 
entire equation 
cannot be displayed.
Display format indicator 
(ENG, SCI, FIX, N2, N1)WriteView mode 
(View as it is written)
Equation display
Answer display
Memory 
symbol
For convenient and easy operation, this model can be used in one of five display modes.
The selected display status is shown in the lower left part of the display (Format 
Indicator).
Note: If more 0’s (zeros) than needed are displayed when the ON/C key is pressed, check 
  Floating decimal point format 1/2 (N1/N2 is displayed)
  Valid values beyond the maximum range are displayed in the form of [10-digit    
  (mantissa) + 2-digit (exponent)]
  Fixed decimal point format (FIX is displayed)
  Displays the fractional part of the calculation result according to the specified    
  number of decimal places.
  Scientific notation (SCI is displayed)
  Frequently used in science to handle extremely small or large numbers.
  Engineering scientific notation (ENG is displayed)
  Convenient for converting between different units.
RESET2. RESET SWITCH
Reset switchRESET
If the calculator fails to operate 
normally, press the reset switch on 
the back to reinitialise the unit. The 
display format and calculation mode 
will return to their initial settings.
NOTE:
Pressing the reset switch 
will erase any data stored 
in memory.
4. DISPLAY FORMAT AND
    DECIMAL SETTING FUNCTION
Let’s compare the display result of
[10000 ÷ 8.1 =] in each display format.
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5. EXPONENT DISPLAY

0.32191.6
(FIX mode TAB = 3)
(SCI mode)
(ENG mode)
(normal mode)
The distance from the earth to the sun is approx. 150,000,000 (1.5 x 108) km. Values 
such as this with many zeros are often used in scientific calculations, but entering the 
zeros one by one is a great deal of work and it’s easy to make mistakes. In such 
cases, the numerical values are divided into mantissa and exponent portions, 
displayed and calculated.
What is the number of electrons flowing in a conductor when
the electrical charge across a given cross-section is 0.32 cou-
lombs. (The charge on a single electron = 1.6 x 10
-19 coulombs).
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6. ANGULAR UNIT
OperationDisplay
90
Angular values are converted from DEG to RAD to GRAD with each push of the DRG
key. This function is used when doing calculations related to trigonometric functions or
coordinate geometry conversions.
Degrees (DEG is shown at the top of the display)
A commonly used unit of measure for angles. The angular measure of a circle 
is expressed as 360°.
Radians (RAD is shown at the top of the display)
Radians are different from degrees and express angles based on the circumfer- 
ence of a circle. 180° is equivalent to π radians. Therefore, the angular mea-
sure of a circle is 2π radians.
Grads (GRAD is shown at the top of the display)
Grads are a unit of angular measure used in Europe, particularly in France. An 
angle of 90 degrees is equivalent to 100 grads.
The relationships between the three types
of angular units can be expressed as right:
π
290˚ (DEG) =
π/2 (RAD) =
100 (GRAD) =
Check to confirm 90 degrees equalling π/2 radians
equalling 100 grads. (π=3.14159...)
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Turns the calculator on or clears the data. It also clears the contents of the 
calculator display and voids any calculator command; however, coefficients in 
3-variable linear equations and statistics, as well as values stored in the 
independent memory in normal mode, are not erased.
Clears all internal values, including the last answer (ANS) and statistics. Values 
stored in memory in normal mode are not erased.
These arrow keys are useful for Multi-Line playback, which lets you 
scroll through calculation steps one by one.
Turns the calculator off.
These keys are useful for editing equations. The  key moves the 
cursor to the left, and the  key moves the cursor to the right. 
The  key deletes the symbol/number at the left of the cursor, and 
the  key deletes the symbol/number at the cursor.
≈Functions and Key Operations≈
ON/OFF, Entry
Correction Keys
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Data Entry Keys

0 to 9
Operation
2 1.4968
Display
Decimal point key. Enters a decimal point. Numeric keys for entering data values.
Pressing this key switches to scientific notation data entry.
Provided the earth is moving around the sun in a circular orbit,
how many kilometers will it travel in a year?
Circumference equals diameter x π; therefore,
1.496 x 10
8 x 2 x π * The average distance between the earth and the sun being
1.496 x 10
8 km. Pressing π automatically enters the value for π (3.14159...).
The constant π, used frequently in function calculations, is the ratio of the
circumference of a circle to its diameter.
Enters the minus symbol.
The subtraction key  is not used for entering negative numbers.
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Random Key

0. *** (A random number is generated.)
[Random Dice]
To simulate a die-rolling, a random integer between 1 and 6 can be generated by 
pressing                          . To generate the next random dice number, press      .
[Random Coin]
To simulate a coin flip, 0 (heads) or 1 (tails) can be randomly generated by pressing  
                        
 . To generate the next random coin number, press      .
[Random Integer]
An integer between 0 and 99 can be generated randomly by pressing                          . 
To generate the next random integer, press      .
Generates random numbers.
Random numbers are three-decimal-place values between 0.000 and 0.999. Using this
function enables the user to obtain unbiased sampling data derived from random
values generated by the calculator. (Using line mode is preferable since in W-View 
mode, the numbers are generated by fractions.)
APPLICATIONS:
Building sample sets for statistics or research.
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5.0
0.6
0.6
5.4
59
9
59
9
Modify Key
Function to round calculation results.
Even after setting the number of decimal places on the display, the calculator per-
forms calculations using a larger number of decimal places than that which appears
on the display. By using this function, internal calculations will be performed using
only the displayed value.
FIX mode TAB = 1 (normal calculation)
Rounded calculation (MDF)
(internally, 0.5555...)
(internally, 0.5555...)
(internally, 0.6)
APPLICATIONS:
Frequently used in scientific and technical fields, as well as business,
when performing chained calculations.
(In W-View mode, press  to show the answer in decimal.)
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